After winning two and losing one of their group stage matches, England bowled out South Africa for 175 in the semi-finals before wrapping up a seven-wicket victory.
Alastair Cook's side will face India in Sunday's final at Edgbaston.
"I hope we are peaking," Trott told BBC Sport. "There's a lot of cricket left this summer, and I hope it will be a great one for England.
"It's been a fantastic tournament [for England], with regards to coming back from a loss against Sri Lanka.
"We had the high of beating Australia first up, and then the game against New Zealand - a tight one in the end, but I thought we played really well - and to beat South Africa at The Oval was a great performance."
The Ashes series begins at Trent Bridge on July 10.